Extension-telephone.



U. G SAUNDERS, JR. EXTENSION TELEPHONE.

APPLICATION FILED OCT. 3. 1914.

l ,1 89,QU1 v lutvm'ml Junv 27, 1916.

DANIEL G SAUNDERS, JR., OF KANSAS CITY, MISSOURI.

EXTENSION-TELEPHONE.

Specification of Letters Patent. Patented June 2'? 19116,

Application filed October 3, 1914. Serial No. 864,1Q05.

To all whom it may concern Be it knownthat I, DANIEL G. SAUNpnRs, J12, a citizen of the United States, residing at Kansas City, in the county'of Jackson and State of Missouri, have invented certain new and useful Improvements in Extension Telephones the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to WlllCll it appertains to make and use the same, reference being had to the accompanylng drawings, and to the letters and figures of reference marked thereon, which forma part of this specification.

My invention relates to extension tele phones, and has for its principal object to provide a device of this character whereby telephone service may be had from dllferent parts of a building otherwise than by the use -of a plurality .of instruments. complishing this object I provide a plui'alit'y ofbase circuit members, all of which v lead to'a common line circuit, together with a portableextension set comprising the instrument/and a wall box which is adapted forcotiperation with any one of the circuit base members and which may be carried from room to room, or tovarious parts of a building, to provide the several extension services without the necessity for a separate wall box for each individual extension.

In the drawing, wherein the preferred form of my invention is-illustrated, Figure I is a perspective view of an extension outfit comprising a base circuit member, which I will hereinafter term a wall board, a wall I box and instrument. Fig. II is a rear perspec- Fig.

tive view of the portable wall box. III is a front perspective view of a wall board. Fig. IV is a vertical section of the wall board and box showing the support of the box and the contacts between the wall board and box. Fig. V is a detail section showing the insulated mounting of the binding posts in the wall board. Fig. VI is a 1 designates the wall board, which may be mounted in any suitable manner, preferably vertically, on the wall of a room or building,

and is provided with spaced binding posts 2,"

- havingconnection with telephone llne wires 3, and having contact heads or "points 4;

the connection ofthe line wires being made and I do declare In ac- Y a circuit through the contained at the back of the board and the contactpoints being exposed at the front thereof to conceal the wire and expose the. contact points. The board 1 is provided above the box, within the pocket 10,. are contact lips 14 which are spaced from each other and from the base of the pocket, and are insulated from the latter by a fiber, or like, mat 15. The lips 14 are preferably of spring material and have loose free ends bowed outwardly from the base of the pocket to con tact with the heads or contact points 4 of the binding posts 2 on the wall board 1, when the parts are assembled. On the back of the wall box .6 are outstruck 1ugs 17 which are adapted for projection into the apertures orsockets 5 in the top of the wall board to support the box; the arrangement of the lugs and contact lips 14 being such that when the box is supported on the-wall board the contact lips will touch the contact heads of the binding post 2 to complete parts of the wall box. It-is apparent that wlth this construction the box will have a limited pivotal mounting on the wall board and that the a contact of the box lips and board points will be insured by the pivotal'action of the wall box'towardthe board.

' The wallbox-comprises the ordinary-bells 19 and a suitable transmitter and receiver, which may consist of a desk set instrument or which may be mounted directly on the box itself.

. Inorder to adapt my improvements to vboxes of any ordinary construction, and

prior to their equipment with the improvements, I prefer to form the pocket lOand lugs 17 in a separate plate 22, which may be-attached to the box 1 by bolts 23, or the like, whereby thebox is ordinarily permanently attached to thewall board.

While I have described my improvements as comprising members wherein the wall board carries the sockets 5 and posts 2, it is readily apparent that the sockets and posts may be on the box and the lugs and spring contacts on the wall without in any way departing from the spirit of my invention.

In using the device, presuming the parts to be constructed as described, and the boards 1 mounted at various portions of a;

building, such as within the various rooms of a residence, the box may be projected on one of the wall boards with the points in contact, so that the circuit is closed through the instrument to enable thelatter to be used in the ordinary manner. Should it be desired to use the telephone in a diflerent room, or portion of a building, the box may be removed from the wall board; preferably by means of ahandle 20, and the box and ipstrumentcarried to the point where the use is desired and mounted on the wall board at that-location, by dropping the box lugs into the board apertures, so

that the box is supported, and its lower portion will swing backto secure contact of the boss lips with the board pgints .When in the latter position, the contacts are made and the instrument may be used.

Itis apparent that as many boards may 'be provided asmay be necessary or desirable', and that but one wall box and instrument are required, thereby eliminating the greatest expense incident 'to the use of a plurality of telephones, and insuring clear service because of the relatively short extension circuit between the wall box and in- 35 strument.

Having thus described my invention, what I clalm as new thereln, and deslre to 'secure by Letters-Patent, is

1. The combination with a wall board having contact points, of a portable instrument box having swinging support on the wall board and having contact points urged has . of the wall board, and contact members at the lower portion of the box urged to enof the box.

3. The combination with a wall board and portable instrument box, one having supporting lugs .andthe other having sockets for receiving the l'ugssto support the box, and contact members-on the board and box, with one set of contact members projected from its carrying part to engage the other set.

4:. The combinationv with a wall board and portable instrument box, one having supporting lugs and the other having sockets for receiving the lugs, tosupport gagement with the board contacts by weight the other set; the projected contacts being flexible, for the purpose set forth.

5. The combination with a wall board having a supporting portion and contact points, of a portable instrument box, a back plate inclosing the back of the box, and having 'a supporting portion adapted for cooperation with the relative portion on the wall board to support the box therefrom, and contact points on the back plate spaced from the supporting portion and engaging.

the board, contacts when the box is supported on the board. d

6. The combination with. a wall board having apertures therein and having contact points spaced from the apertures, of a portable instrument box, a back plate inclosing the boxat the rear and having-downwardly and rearwardly struck lugs adapted for pro jection into the wall board apertures to support the box, and contact points on the rear of the back plate adapted for engaging the wall board contacts when the box is supported from the wall board.

7 The combination with a wall board having a supporting portion and contact points, of a portable instrument box having a supporting portion whereby the box is hungfrom the supporting portion of the wall board, and having a socket, contact members anchored in the socket and having free ends projecting from the socket and engaging the wall board contacts when the box is supported uponthe board.

8. The combination of a portable telephone box and a wallboard, means for supporting the box upon the board, said means comprising lugs on one member and cooperating receivlng sockets on the other member; said lugs or sockets being-tapered to guide the cooperating supporting member's into accurate position when the box is supported upon the board.

, 9. In a portable telephone box, a wall board, electric contacts on the box and cooperating bontacts on the board, means for supporting the -box upon the board, said means comprising lugs on one member and cooperating receiving sockets on the other member, said lugs or sockets, or both, being tapered to guide the cooperating parts into accurate position when the box is supported upon the board. v

10. The combination .with a wall board having its front face spaced from a supporting wall, and havlng a supporting portion on its face, electric terminals on the face of the board, said terminals being connected to line wires; a portable box, telephone apparatus within the box, a supporting por-.

tion at the back of the box adapted to cooperate with the supporting portions on the board, and electric terminals at the'backof the boxconnected with telephone apparatus within the box and adapted to form contact with the terminals on the board when the box is supported on the board.

11. A wall board having its face spaced from a wall, supporting means on the face of the board, electric terminals on the face of the board connected to line wires and spaced from the supporting means on the board, a box adapted for support on the board, telephone apparatus within the box,

electric terminals atthe back of the box 0011- nected with the telephone apparatus within the box and adapted ;to form contact with the terminals on the board whenthe box is I supported on the board.

12. A wall board having its face side spaced from a wall, supporting "means on the face of the board, electric termluals on the face of the board passjmgthroughthe board, line wires connectedwith' the terminals at the back of the board, a portable box, telephone apparatus "within the box,

supporting means at the*-back' of the box' the apparatus within the box, a wall board pierced to permit the passage of electric contacts through the board, contacts ar-' ranged to cooperate with contacts on the box, means for connectingline wires to the contacts at the back of the wall board, and

meansfor supporting the box on the wall board so that the contacts on the back of the box cooperate with the contacts on the board and make the proper connections between the line-Wires and the apparatus within the points, of a box box when the box is supported on the wall board.

14. The combination with a wall board having a supporting portion and contact points, of a'boxcomprising an inclosing portion and an auxiliary back attached to the inclosingportion, and contact members adapted for cooperation with relative mem-' bers on the wall board.

15. The combination with a wall board having a supporting portion and contact having an auxiliary back provided with a like members on the wall board when the 1 supporting portion fof the auxiliary back is in operative relation on'the wall board.;

16. The combination with a wall board and a box back plate, one having lug sockets and the other lugs for supporting engagement in the sockets and both having conto a relative portion 'tact points arranged for cooperative engagement when the back plate is supported from the wall board, and an instrument box attached to and supported by the back plate.

17; lhe'combination with a wall. board having its front face spaced from a supporting wall, and, having a supporting portion, electric terminals on the board, said terminals being connected to line wires: a

portable box, telephone apparatus within the box, a supporting portion on the box adapted to cooperate with the supporting portion on the board, and electricterminals at the back of the box adapted to form contact with the terminals on the board when the box is supported on the board. I

' In testimony whereof I afiixmysignature in presence of two witnesses.

DANIEL e. sanannas. ea

Witnesses: i

LYNN RoBrNsoN, L. E. Coats.

pocket and, a supporting portion, and contact members mounted in the pocket and adapted for cooperation with 

